multi: Add internal ethereum clients.

client/asset/eth/config.go

@@ -0,0 +1,37 @@
+// This code is available on the terms of the project LICENSE.md file,
+// also available online at https://blueoakcouncil.org/license/1.0.0.
+
+package eth
+
+import (
+	"fmt"
+
+	"decred.org/dcrdex/dex"
+	"decred.org/dcrdex/dex/config"
+)
+
+// Config holds the parameters needed to initialize an ETH wallet.
+type Config struct {
+	AppDir         string  `ini:"appdir"`
+	NodeListenAddr string  `ini:"nodelistenaddr"`
+	GasFee         float64 `ini:"gasfee"`
+}
+
+// loadConfig loads the Config from a setting map and checks the network.
+//
+// TODO: Test this with windows.
+func loadConfig(settings map[string]string, network dex.Network) (*Config, error) {
+	cfg := new(Config)
+	if err := config.Unmapify(settings, cfg); err != nil {
+		return nil, fmt.Errorf("error parsing config: %w", err)
+	}
+	switch network {
+	case dex.Simnet, dex.Testnet:
+	case dex.Mainnet:
+		// TODO: Allow.
+		return nil, fmt.Errorf("eth cannot be used on mainnet")
+	default:
+		return nil, fmt.Errorf("unknown network ID: %d", uint8(network))
+	}
+	return cfg, nil
+}